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GIAC GISP Exam - Topic 3 Question 84 Discussion

Which of the following encryption algorithms are based on block ciphers?
B) RC5 and C) Twofish and D) Rijndael
A) RC4

GIAC GISP Exam - Topic 3 Question 84 Discussion

Actual exam question for GIAC's GISP exam
Question #: 84
Topic #: 3
[All GISP Questions]

Which of the following encryption algorithms are based on block ciphers?

Show Suggested Answer Hide Answer
Suggested Answer: B, C, D

by Dino at Apr 08, 2026, 04:23 PM

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Lovetta
3 days ago
I feel confused about RC5. Is it block?
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Tom
8 days ago
RC4 is a stream cipher, not block.
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Jamey
13 days ago
Yeah, Rijndael too! It's the basis for AES.
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Maile
19 days ago
I think Twofish is a block cipher.
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Edelmira
24 days ago
Wait, are you sure Twofish is still used?
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Lili
29 days ago
I thought RC5 was outdated?
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Ranee
1 month ago
RC4 is a stream cipher, not block.
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Felix
1 month ago
Rijndael is the same as AES, right?
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Lamonica
1 month ago
Twofish is definitely a block cipher!
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Zita
2 months ago
Wait, are you sure Twofish is still used?
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Barabara
2 months ago
I thought RC5 was outdated?
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Jeannetta
2 months ago
RC4 is a stream cipher, not block.
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Edison
4 months ago
Rijndael is the same as AES, right?
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Leigha
4 months ago
Twofish is definitely a block cipher!
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Estrella
4 months ago
I'm a bit confused; I thought RC5 was a block cipher too, but now I'm second-guessing myself.
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Melissia
4 months ago
I feel like I saw a question about block ciphers in practice, and I think both Twofish and Rijndael were mentioned there.
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Bulah
5 months ago
I remember studying that RC4 is a stream cipher, so it can't be one of the answers.
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Emogene
5 months ago
I think Twofish and Rijndael are definitely block ciphers, but I'm not sure about RC5.
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